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Price: Free trial, $30 per year
Compatibility: Requires Android
SignEasy is a simple and convenient way to sign documents securely from your Android smartphone or tablet. It works by taking imported files from email, the web, and storage services including Dropbox, Box, and Google Drive, which you can then sign with either your finger or a stylus. Once you've edited the file with your signature, dates and the like, then the file can be saved and exported back to its original location.
The app supports a number of document formats, including .pdf, Word, Excel, HTML and JPEG.
Via: Google Play